"I think naturally every quarterback's skillsets are a little different," Modkins said on Thursday. "What's great is both of their skillsets are really great for our offense. We'll get to see more of their skillsets once we get further along in this camp. And when we get into the preseason games, they'll be able to show more."

One difference that appeared during the 49ers practices thus far in camp has been Kaepernick's willingness to pull the ball more on the 49ers zone read plays. Modkins said Kaepernick executing more of the quarterback runs has not been by design.

Fantasy Impact:

While Kelly denied that he needs a mobile QB for his offense, he hasn't really had one outside of Michael Vick in Philly, and that was for a limited time. Kelly claims he can adjust the offense to any signal caller, but it sure seems Kaepernick would be a much better fit. However, no one seems to have the edge in this battle right now.